Massive lava ‘fin’ rises up in Mount St. Helen’s crater
Again, it’s over the border in Washington, but since you can see it clearly on a beautiful day like today, Portlanders sometimes claim Mt. Saint Helen’s as their own…
A spectacular new structure has formed inside the crater at Mount St. Helens, just in time for this weekend’s opening of the Spirit Lake Highway.
A slab of rock the size of a football field is standing on end inside the crater.
The giant ‘fin’ is pushing upwards of four to five feet a day, but is not growing taller because it tends to crumble as it grows.